Device for deforming insert in concrete joints



Jun 12, 1962 w. F. MIDDLESTADT 3,038,397

DEVICE FOR DEIFORMING INSERT IN CONCRETE JOINTS 2 Sheets-Sheet 1 FiledJune 25, 1959 l]. Ill

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BY 5%. W I ATTORNFXS June 12, 196 w. F. MIDDLESTADT 3, 3

EIFORMING INSERT IN CONCRETE JOINTS DEVICE FOR D 2 Sheets-Sheet 2 FiledJune 23, 1959 3,938,397 Patented June 12, 1962 lice 3,838,397 1 6RDEFURMZNG INSERT 3N CQNCRETE .IOTNTS William 13. Middlestadt, 4041 TheAlameda, Eaitimore 18, Md. Filed dune 23, 1359, Ser. No. 322,273 3Claims. ((11. 94-459) This invention relates to a device for deforminginsert members in concrete joints and more specifically to an apparatuswhich is especially designed for use in connection with the method andinsert member disclosed and claimed in my co-pending applications,Serial No. 727,160, filed April 8, 1958, now abandoned, and Serial No.740,858, filed June 9, 1958.

In the co-pending applications referred to above, there is described amethod for forming joints in concrete wherein an insert member which maybe of a generally tubular form is inserted in the concrete before theconcrete has cured. The member is inserted so that the upper surface ofthe insert is generally level with the surface of the concrete. Afterthe concrete has cured, an apparatus according to the presentlydisclosed invention is used to deform or depress the upper surface ofthe insert, so that it is disposed beneath the upper surface of theconcrete and forms a bellows-like configuration having an upwardlyopening U-shape. The space above the insert member may be filled withsealer and the joint is completed. There are many advantages in thismethod over prior art methods for forming concrete joints. Many of theseadvantages relate to the shape of the upper surface of the insert andthe apparatus disclosed in the present application is adapted to causethe upper surface to as sume the bellows-like configuration referred to.

According to the present invention, there is provided a wheeled framehaving a motor mounted on the frame, which motor drives a shaft. Theshaft has an eccentric portion and freely journaled on this eccentricportion is a deforming disc which is the element which actually forcesthe insert member downwardly in the concrete to assume the formpreviously described. The mounting of this disc causes it to movevertically with a hammering action, as the eccentric shaft is rotated.The supporting wheels for the device are mounted so that they can beraised to a position wherein the deforming disc is operative, or loweredso that the disc is not in engagement with the supporting surface.

An object of the present invention is to provide a device which isadapted to shape an insert member in a concrete joint.

Another object of the present invention is to provide a device in whicha deforming disc is eccentrically mounted with respect to a rotatingshaft and is fully rotatable on the shaft so that the disc moves with areciprocating or hammering movement.

Other objects and many of the intended advantages of the presentinvention will become apparent upon consideration of the followingdetailed specification in connection with the accompanying drawingswherein:

FIG. 1 is a front elevational view of the present invention,

FIG. 2 is a side elevational view,

FIG. 3 is a side view partially in section, and

FIG. 4 is a perspective view of a detail.

Referring now more specifically to the drawings, there is shown in FIG.1 a supporting frame comprising uprights 1 and 2, and a cross member 3secured to the upper ends of the uprights. Brackets 4 and 5 extendbetween the uprights and the top plate and provide additional supportmeans.

As is shown in FIGS. 1 and 2 the top plate 3 has eyes 6 and 7 securedthereto, and extending upwardly therefrom. A pin 8 extends through theapertures in the members 6 and 7 and journaled on pin 8 are aperturedflanges 9 and 10 which extend downwardly from a motor support 11. As isevident from FIG. 2 the supporting means described is located at one endonly of the motor support plate 11, and the forward end of the plate issupported by means of bolt 12 having a resilient bushing 13 extendingbetween the plates 3 and 11. It can be seen that by tightening orloosening the bolt 12 so as to compress the bushing to a lesser orgreater extent, the relative positions of plates 3 and 11 can be varied.

The motor 14 is fixedly mounted on the plate 11, and this motor may beof any suitable variety and the motor drives a shaft 15 having a pulley16 mounted thereon. A belt 17 interconnects pulley 16 with a pulley 18,fixedly mounted on a shaft 19. This shaft is freely journaled in journalboxes 20 and 21, mounted in the uprights 1 and 2 respectively. It can beseen that by tightening or loosening the bolt 12, the tension in belt 17may be adjusted so that the shaft 19 is properly driven by the motor14-.

The shaft 19 has a portion there-of identified by the numeral 22, whichportion is slightly eccentric with respect to the axis of rotation ofshaft 19. Freely rotatable on this eccentric portion is the deformingdisc 23 which is retained in its central position with respect to theshaft by collars 24 and 25 which are rotatable with the shaft. Disc 23has an enlarged central portion terminating in a shoulder 44 to providean outer edge portion 45 of re duced thickness. It can be seen thatrotation of the shaft 19 by motor 14 will produce motion of the discwith respect to the supporting frame to the extent that the portion 22of the shaft is eccentric. It is this motion of the disc which causes ahammering action deforming the concrete insert member to the desiredshape.

The supporting frame is provided with a handle structure includingangularly extending bars 26 and 27 which are suitably secured to thesupporting frame and extend upwardly having their outer ends thereofinterconnected by a tubular handle bar 28. A rod element 29 extendsthrough the tubular element 28 and through the outer ends thereof and isrigidly connected to links 30 and 31. These links have the opposite endspivotally interconnected with links 32 and 33. The lower ends of links32 and 33 are pivotally interconnected with connecting rods 34 and 35respectively, and the connecting rods have the inner ends thereofrigidly attached to blocks 36 which are more clearly shown in FIG. 4. Asseen in FIG. 4, the block 36 is provided with shafts 37 and 38 which areoffset with respect to one another. The shafts 38 have the supportingwheels 39 and 40 freely rotatable thereon, and the shafts 37 arejournaled in the uprights 1 and 2. By suitable movement of the handle 41mounted on one link 31, the connecting rods 34 can be moved clockwise asviewed in FIG. 2, and thus cause the supporting wheels 30 and 40 to movedownwardly with respect to the axis of rotation of shafts 37. Thismovement will cause the supporting frame and deforming disc to moveupwardly with respect to the supporting surface.

There is shown in FIG. 1 a supporting surface which is of concrete. Theframe is provided with a foot 43 which rests on this supporting surface.An insert 42 had been positioned in the concrete before hardening sothat the upper surface of the insert was level with the upper surface ofthe concrete. After curing the presently disclosed apparatus is utilizedto depress the insert 42 so that it assumes the bellows-likeconfiguration shown in FIG. 1. The apparatus is operated by moving thedevice to the joint so that the deforming disc 23 is disposed directlyabove the insert 42. The handle 4-1 is then positioned as shown so thatthe wheels are lowered and the disc will depress the insert member tothe position shown. The outer edge portion 45 of the disc will be forcedinto the upper surface of the insert member until the shoulder 44engages the insert as clearly shown in FIG. 1. The rotation of theeccentric shaft 22 will produce a hammering action on the insert anddepress it gradually to the final position. It can be seen that thecrimping action will be a gradual transition from the initial point ofcontact of the deforming disc with the final action occurring directlybeneath the center of rotation of the disc. By using a large disc acomparatively large Wearing surface i provided and it can be seen thatwith the presently disclosed apparatus a joint can be completed from oneside of the pavement to the other without the necessity for turning themachine around.

Obviously many modifications and variations of the present invention arepossible in the light of the above teaching. What is claimed as new anddesired to be secured by Letters Patent is:

1. A device for deforming a tubular member having an upper surface andside Walls, the tubular member adapted to be inserted in concrete, saiddevice comprising a 'Wheeled frame, power means mounted on said Wheeledframe, a shaft journalled in said frame, said shaft adapted to be drivenby said power means, said shaft having an eccentric portion, a discfreely journ alled on said eccentric portion, said disc having an outeredge portion and a shoulder portion adjacent said outer edge portion,said edge portion adapted to engage the upper surface of the tubularmember inserted in the concrete and to depress the upper surface thereofto a position wherein the side walls engage the shoulder portion to forma bellows configuration of the upper surface, the disc rotating as thewheeled frame is advanced along the member, the rotation of the shaft bythe power means causing a hammering action by the disc to deform themember in the concrete.

2. A device according to claim 1 and further including means for raisingand lowering the wheels with respect to the frame.

3. A device according to claim 1 and further including a belt driveinterconnecting the power means and said shaft, said power means beingmounted on a platform and means for adjusting the height of saidplatform to vary the tension in said belt drive.

References Cited in the file of this patent UNITED STATES PATENTS1,550,192 Schlueter Aug. 18, 1925 1,718,840 Thom asson June 25, 19291,801,622 Blass Apr. 21, 1931 1,819,304 Robertson Aug. 18, 19311,865,685 Flynn July 5, 1932 1,963,700 Heltzel June 19, 1934 2,055,974Greiner Sept. 29, 1936 2,248,478 Mall July 8, 1941 2,295,322 ArborioSept. 8, 1942 2,653,806 Robbins Sept. 29, 1953

